Writing instrument



FIG. 1 is a perspective view of a writing instrument;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left elevation view thereof;

FIG. 5 is a right elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view of the writing instrument according to an uncapped embodiment.

The broken lines in the drawings illustrate portions of the writing instrument which form no part of the claimed design. 

CLAIM The ornamental design for the writing instrument, as shown and described. 